Pansnerite
Pansnerite is an IMA-recognized mineral species in the arsenate class, with the chemical formula K₃Na₃Fe³⁺₆(AsO₄)₈.
It crystallizes in the orthorhombic crystal system (space group Cmca). It is a member of the Ozerovaite structural group.
Key properties: Mohs hardness 3; specific gravity 3.596; Vitreous luster; optically biaxial.
IMA symbol Pns, IMA status: approved, named in 2017.
Forms as a sublimate at an active volcanic fumarole.
It is found associated with Aphthitalite, hematite, sanidine, badalovite, khrenovite, achyrophanite, arsenatrotitanite, ozerovaite, tilasite, calciojohillerite, johillerite, nickenichite.
The mineral was named to honor Lavrentiy Ivanovich Pansner (1777-1851), German-Russian mineralogist and geographer and specialist in the studies of physical properties of minerals.